The successful 2012 test of the missile brought India closer to joining the small group of nations — including the U.S., China, Russia, the U.K. and France — with the capability to deploy intercontinental ballistic missiles.
India is also developing the sixth in its series of Agni ballistic missiles that will be capable of carrying multiple warheads. While Agni-V can carry up to three nuclear warheads, Agni-VI will carry up to 10.
India has said its missile program is not directed against any country.
Agni, meaning fire in Hindi and Sanskrit, is a rocket family India has tested since 2002.
In 2010, India successfully test-fired Agni-II, an intermediate-range ballistic missile with a range of more than 2,000 km (1,250 mi.).